Reading directly from the event channel instead of using `PollEvent`

[khamidou]

Hi @gdamore – thank you for building tcell, it's a great library! I'm building an app that makes requests that can take several dozen seconds. I'd like to display some loading animation during the time. My code looks a bit like this:

func updateLoadingScreen(s tcell.Screen, ch chan bool) {
    ticker := time.NewTicker(1 * time.Second)
    for {   
        select {
        case <-ch:
            return
        case <-ticker.C:
            // update loading animation
        }
    }
} 

I'd like to be able to also handle keyboard events so users can exit if the request is taking too much time. However, given that PollEvent is blocking, my animation won't update while we wait for a keyboard event.

Looking at the PollEvent code I see that it's just a blocking select over evch. Have you considered adding a method to the Screen interface that would return a reference evch instead?

btw I'd be happy to contribute a patch for this if you think it's a valid enhancement.

[rockorager]

Hey khamidou -

Checkout screen.ChannelEvents. You provide a channel and tcell will send it's events on it.

[khamidou]

Oh interesting, thank you @rockorager!